Die for coating ribbon wire



R. KIERSPE 1 DIE FOR COATING RIBBON WIRE Filed Aug. 9, 1944 Inventor: Raymond L..Kie1-sp e,

His Attorn e Patented July 31, 1945 ammo NT OFFICE DIE FOB COATING RIBBON wras 3 L. Kiel-ap to General Klee New York Fort Wayne-Int, assignor trio Company, a corporation of "Application Ain't I, 19, Serial l lo. 548,748

momma The present invention relates to dies for, coating wire especially ribbon wire with enamel. varnish, lacquer or like viscous coating material. Theusualribbonwirehasawidthoftheordm' of 100 mils and a thickness of about 4-15 mils.

The object of my invention is to provide an improved die whereby one or several coatings of uniform thickness may be eifectively applied to ribbon-wires.

indicated in dash-dotted lines four different sectionsofthewireipas'singatonetimsthrough the single die I. The plates II, II are secured to end plates II, II. Each of these end plates II, II has two openings II each for receiving a dowel pin" on one of the plates II, II. In addition each end plate II, 2| has a-pair of openings 21 for receiving screws II to fasten the end plates to the plates II, II. The die is floatingly sup- Foraconsideration of whatibelieve tobenovel ported. To this end an upper portion of eac and my invention, attention is directed to the following description and the claims appended pla thereto in connection with the accompanying drawing.

end plate II, ll located vertically above the II is provided with a shaft stub II secured thereto and attached to the inner race 'of a ball bearing .II, the outer race of which en- In the drawing Fig. 1 illustrates an apparatus gages a track formed by the sup latter for enameling ribbon wire including a die embodying my invention; Fig. 2 is an exploded perspective view of the die of Fig. 1; and Fig. 3 illustrates a modification of the die. The enameling or; coating apparatus in the present example as shown in Fig. 1 comprises a container I for viscous coating material 2. A ribbon wire I to be coated isbrought from a pay-off reel 4 over a guide sheave I immersed within the liquid coating material 2. The wire leaves the 2 container I with itssurface covered with a; nonuniform thick layer of coating material. In order to spread the coating material uniformly over the wire and to remove excessive coating material therefrom the wire passes through a die I floatingly held on a support I secured to the lower end of a baking oven -I. 'The latter has spaced parallel walls I, II and is heated, in the present example by a plurality of electric heating elements ll. disposed within recesses of the walls I, III. The lower end of the wall I forms a channel I! for admitting air to the oven.

On its e through the oven the coating material is baked. Usually the wire improvided with several coatings and to this end a wire with is in the form of a U-shaped bracket with parallel lower and upper horizontally disposed legs and a base suitably supported, in the present instance, secured to the wall I of the oven by means of screws 21 (Fig. 1). To limit sidewise movement of the die and to avoid frictional eng'agement between the adjacent surfaces of the plates II and II and the lower legs of the U- shaped bracket, a plate I. is secured to the outer 5 surface of the lower leg of each bracket. This limits any tendency of the die to turn about the axis of the wire. on the other hand the die is free to move along the track formed by the supportanditisalsofreetoswingabouttheaxisof so the roller bearings. During operation the rollerv bearings are forced towards the respective upper legs and when out of operation they rest on the lower legs. 1

The adjacent surfaces of the extension II, II

of the plates II, II constitute wiping surfaces because they wipe from the wire passing between them excessive amounts of coating material. These wiping surfaces contact the coating material but they do not contact the metallic surface 40 of the wire because the die is self-centering.

its first heat-hardened insulating coating leaving This 18 accomplished y he V- hnped p the oven is passed over a sheave i3 and then -recirculated through the coating, material and the The die I formed below the wiping surfaces of the die. During operation this V-shaped space fills itself with coating material to an extent which depends upon the viscosity of thematerial. The width of the wiping slot formed between the plates l5, II is slightly wider than, the thickness of the ribbon wire plus the total thickness of the coating to be formed on opposite sides thereof. As long is, uniformly spaced from the wiping surfaces, the hydraulic pressure of the coating material produced by the upward movement of the wire will be the same on opposite sides of the wire wiping slot. If nowfor some reason.

as the w1re.is centered in the wiping slot, that torinstanceincaseofashortbumponthewire. the die should move closer toward one side of thewire.thenthehydraulicpressureofthecoat-' ing material developed by the upward movement ranged at an angle towards each other, said plates I stances'it is desirable to apply successive coatings of different thicknesses thickness of successive coatings. A die suitable for such purposes is shownin Fig. 3. Roomprises two supporting plates 20, Ill corresponding to the plates II, II of Fig. 2 except that these supporting plates II, III do not have upper integral extensions forming wiping surfaces. The plates 20, 8. are secured to end plates 3| corresponding to the end plates", ll of Fig. 2 and provided with ball-bearing supporting means 82 for engaging a bracket as described above. In place oi the extensions II, ll of Fig. 2 thedie in Fig. 3 is provided with four pairs of wiping, blades or fingers 38. The fingers of each pair are secured to the supports 2!, is by means including a bar 34 and a screw ll projecting through a bore 36 of the bar and a slot 81 of the finger andengaging a threaded bore II in the plate ll or II. The end portions of the fingers form adiacent parallel wiping surfaces ll similar to the wiping surfaces 01' theextensions II, II in .Fig. 2. In order to keep the fingers ofeach pair, especially the end portions thereof, parallel andto reduc misalignment, each finger is preferably positioned in a slo ll of the plates II, II. -In order to vary the width of the wiping p between the surfaces ll oi'thefingerathescrewsllareloosenedandtM fingers are moved up or down. Upon downward movement of the fingers the gap is increased to apply a thicker coating and, vice versa. upon upward movement of the fingers the width of the gap is reduced to apply a thinner coating. More accurate adjustments of the fingers are readily accomplished by an adjusting screw ll screwed intoathreadedborellofeachplatelland be -rlndagainst a finger: As one of the screws 4i isthreaded deeper intothe bore 42 therespective finger is forced closer towards the cooperating finger and vice versa. With'this arrangement, coating ofdifierent thicknesses-may be appliedto awireandthediileientpairsoffingers may be difi'erenfly set to apply. successive coatings oi'diiferentthicknessesto awlre. 'lhistirpeoi die does not wipe the edges of ribbon wire. This and also to vary theassures thereof, I desire to have it understood that the apparatus shown is only illustrative and that the invention may be carried out by other means.

What I claim asnew and desire to seoure'by Letters Patent of the United States is:

1. Inch apparatus for applying liquid coating material to a ribbon wire the combination of a support including two ti-shaped brackets with horizontally extending parallel legs and a die for removing excessive coating material from such wire after having passed through a body of liquid coating material, said die having two plates arbeing formed with extensions having adjacent parallel surfaces forming a wiping slot, and means including ball bearings secured to the ends of the plates and supported between shaped brackets.

2. A die for coating ribbon wire comprising two Plates inclined towards each other and having extensions with adjacent parallel surfaces forming a wiping slot between them, end plates secured to the respective ends of said plates, and means for fioatingly supporting the die comprising a shaft stub secured-to each end plate a support forming parallel tracks and means supporting the shaft stubs on the tracks.

3. A die for coating ribbon wire comprising two plates arranged at an angle towards each other and having extensions integrally formed therewith, said extensions having 'adjacent parallel surfaces defining a wiping slot of a width equal to tl-iethicknessorthewiretobecoatedplusthe thickness of the coating on opposite sides of the wire, said. wiping slot having a length sufiicient to permit simultaneous passage therethrough 01 several parallel spaced sections of a wire, means rigidly connecting the ends of the plates. and means including antiiriction hearings on the last named means for floating supporting the die.

twoplateshavingupperpcrtionswithparallel ingeneral is not needed with ribbon'wire because thesurface tension of the coating material causes spreadingthereoiiromtheedgestowardsthe sides thereof. The adiustabk fingers or blades are preferably 'made of spring steel topermit any irregularities such as aheavybraseto passbetween them-without causing breaking of the wire. During operation the-wire moves freely through the wiping slotwithout any scraping action on the edges'thereoi" I Having described the method of of my inven i Met-her with the "apparatus which I now consider to representthe best embodiment adiacent-suriaces defining a wiping slot and lower bent outwardly to define a V- oi'fingersadiustablysecuredtothepllficland having lowerportionsinclinedtowardseachother' 6. Adieiorcoatin'gribbon wiretwo" plates inclined towards each other, each'having of fingers,

in said slotsreach pair or fin ers having portions forming a wiping slot, and

theleIsoitheU- 8. A die for coating ribbon wire comprising a pair of inclined plates having outer surfaces with parallel slots, a plurality of pairs of fingers, each pair of fingers being positioned in corresponding against an upper portion of the finger, the fingers being made of spring steel'whereby adjustment of said screws causes the fingers of each pair to move relative to each other.

slots of the plates and having upper portions 5 10. A die for coating ribbon wire comprising a forming a wiping slot between them, and means pair of inclined plates having outer surfaces with addustably securing each finger in a slot of the parallel slots, a plurality of pairs of fingers, each plate, said means including a slot formed in the pair of fingers being positioned in corresponding lower portion of each finger, a bar engaging the slots of the plates and having upper portions finger and a screw projecting through an open- 10 forming a wiping slot between them, and means ing in the bar and through the slot of the finger adjustably securing each finger in a slot of the and being secured to the respective plate. plate, said means including a bar having a lower 9. A die for coating ribbon wire comprising a portion secured to the finger and the respective pair of inclined plates having outer surfaces with plate and a screw threaded through an upper parallel slots, a plurality of pairs of fingers, each 15 portion of the bar and having an end bearing pair of fingers being positioned in corresponding against an upper portion of the finger, separate slots of the plates and having upper portions end plates secured to the ends of said plates, each forming a wiping slot between them, and means end plate having a portion located vertically adjustably securing each finger in a slot of the above the fingers, shaft stubs secured to the last plate, said means including a bar having a lower 20 named portions, ball bearings for the shaft stubs,

portion secured to the finger and the respective plate and a screw threaded through an upper portion of the bar and having an end bearing and stationary brackets forming tracks for the ball bearings.

RAYMOND L. KIERSPE.

CERTIFICATE OF. CORRECTION Patent No. 2,580,729.

RAIHOND L, KIERSPE.

It is hereby certified that error appears in the printed specification of the above numbered'patent requiring correction as follows: Page -2, second column, line 614, claim 6, for "and plates" read ---end plates--; and that they said Letters Patent should be read with this correction therein that the same may conform to the record of thecase in the Patent Office. I

Signedand sealed this 20th day of November, A. D. 19145.

Leslie Frazer First Assistant Commissioner of Patents.

8. A die for coating ribbon wire comprising a pair of inclined plates having outer surfaces with parallel slots, a plurality of pairs of fingers, each pair of fingers being positioned in corresponding against an upper portion of the finger, the fingers being made of spring steel'whereby adjustment of said screws causes the fingers of each pair to move relative to each other.

slots of the plates and having upper portions 5 10. A die for coating ribbon wire comprising a forming a wiping slot between them, and means pair of inclined plates having outer surfaces with addustably securing each finger in a slot of the parallel slots, a plurality of pairs of fingers, each plate, said means including a slot formed in the pair of fingers being positioned in corresponding lower portion of each finger, a bar engaging the slots of the plates and having upper portions finger and a screw projecting through an open- 10 forming a wiping slot between them, and means ing in the bar and through the slot of the finger adjustably securing each finger in a slot of the and being secured to the respective plate. plate, said means including a bar having a lower 9. A die for coating ribbon wire comprising a portion secured to the finger and the respective pair of inclined plates having outer surfaces with plate and a screw threaded through an upper parallel slots, a plurality of pairs of fingers, each 15 portion of the bar and having an end bearing pair of fingers being positioned in corresponding against an upper portion of the finger, separate slots of the plates and having upper portions end plates secured to the ends of said plates, each forming a wiping slot between them, and means end plate having a portion located vertically adjustably securing each finger in a slot of the above the fingers, shaft stubs secured to the last plate, said means including a bar having a lower 20 named portions, ball bearings for the shaft stubs,

portion secured to the finger and the respective plate and a screw threaded through an upper portion of the bar and having an end bearing and stationary brackets forming tracks for the ball bearings.

RAYMOND L. KIERSPE.

CERTIFICATE OF. CORRECTION Patent No. 2,580,729.

mrnoma L, mnsrs.

It is hereby certified that error appears in the printed specification of the above numbered'patent requiring correction as follows: Page -2, second column, line 614, claim 6, for "and plates" read ---end plates--; and that they said Letters Patent should be read with this correction therein that the same may conform to the record of thecase in the Patent Office. I

Signedand sealed this 20th day of November, A. D. 19145.

Leslie Frazer First Assistant Commissioner of Patents. 

